Updated Krill version & added controller tests with OAuth2 access token.

Change-Id: Ib26d297a1446e5a4a6d6f4c5035b4e0a0e5f3fb9
diff --git a/core/pom.xml b/core/pom.xml
index 3659102..2cc97db 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -251,7 +251,7 @@
 		<dependency>
 			<groupId>de.ids_mannheim.korap</groupId>
 			<artifactId>Krill</artifactId>
-			<version>0.56.2</version>
+			<version>0.57.0</version>
 			<exclusions>
 				<exclusion>
 					<groupId>org.xerial</groupId>